How can the shadow of the tiny moon eclipse the sight of the gargantuan sun? By sheer coincidence, the disc of the sun is 400 times larger than the disc of the moon, but it's 390 times farther from Earth -- which means that when they align just right..., the moon blocks all but the sun's glowing corona. Andy Cohen details this extraordinary celestial phenomenon (and when it will next occur). Lesson by Andy Cohen, animation by Bevan Lynch. (03:45)[more]

A total solar eclipse happens somewhere on Earth once every year or two. What is an eclipse? Learn more about how solar eclipses happen, the four types of eclipses, and how to view the Sun safely if you're within the path of totality. (04:57)

It's been referred to as "the Super Bowl of the Sky" - the total solar eclipse on August 21 that will allow people across the continental United States to witness a rare and spectacular celestial event. Made in Memphis - solar eclipse glasses. Martha... Teichner meets with retired NASA astrophysicist Fred Espenak (known as "Mr. Eclipse") and with other "umbraphiles" whose love of eclipses outshines all else. (08:40)[more]

On August 21, 2017, the long-anticipated total solar eclipse will darken the skies from Oregon to South Carolina as the Moon passes between the Earth and Sun. The last time the contiguous United States saw a total solar eclipse was in 1979, and the n...ext one won’t be until 2024. (53:05)[more]

Solar eclipses result from the alignment of the Sun, Moon, and Earth. Total solar eclipses — in which the Sun is completely blocked by the Moon — are a spectacular and rare sight to witness. In this animation adapted from NOVA, see why solar eclipses... occur and observe a simulated total eclipse. Closed captioning included. (01:13)[more]

On Monday, August 21, 2017, our nation will be treated to a total eclipse of the sun. The eclipse will be visible -- weather permitting -- across all of North America. The whole continent will experience a partial eclipse lasting two to three hours. ...Halfway through the event, anyone within a 60 to 70 mile-wide path from Oregon to South Carolina will experience a total eclipse. During those brief moments when the moon completely blocks the sun's bright face for 2 + minutes, day will turn into night, making visible the otherwise hidden solar corona, the sun's outer atmosphere. Bright stars and planets will become visible as well. This is truly one of nature's most awesome sights. (01:39)[more]

There's an Eclipse coming on August 21st, and Jessi and Squeaks are PUMPED! Today, they'll show you where in the world you'll be able to see the eclipse, what happens during an eclipse, and tell you how you can watch the eclipse safely! (04:02)
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In this spell-binding professionally-made video, Professor Brian Cox visits some of the most stunning locations on Earth to describe how the laws of nature have carved natural wonders across the Solar System. (03:11)

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